Im looking to find some information on the Dallmeyer 14" 355mm f5.6 UU421866 but am coming up a little sort on info. Does anyone know what the image circle size is at 1:1? Im also thinking of purchasing a 355mm g-claron, how does the dallmeyer compare to the g-claron in regards to sharpness and coverage? Im a little curious if the dallmeyer will be able to cover 14x17 and 12x20?